Fix a handful of errors and warnings I've seen. Gets further running in docker, now.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3773 ed5197a5-7fde-0310-b194-c3ffbd925b24

core/app.js

@@ -60,7 +60,6 @@ function socket(request, response, client) {
 					blobId = await new Database(user).get('path:' + path);
 					if (!blobId) {
 						response.send(JSON.stringify({action: "error", error: message.path + ' not found'}), 0x1);
-						request.close();
 					}
 				}
 				response.send(JSON.stringify({action: "session", credentials: credentials}), 0x1);